Electrical system of distribution.



100.009,30 EATENTED 001201007.

A. s. HUEBAED A: w. A. TUEBAYNE. ELECTRICAL SYSTEM 0E DISTRIEUTIoN.

APPLICATION FILED JUNE 20.1906.

UNITED STATES PATENT OFFICE.

ALBERT S. HUBBARD, OF BELLEVILLE, NEW JERSEY, AND WILLIAM A. TURBAYNE, OF

LANCASTER, NEW YORK, ASSIGNORS T GOULD STORAGE BATTERY COMPANY, A COR- PORATION OF NEW YORK.

ELECTRICAL SYSTEM OF DISTRIBUTION.

specificati@ ommen Pneus Plitenied Oct. 29, 1907.

Application iled June 20| 1906- Berisl No. 322.529.

To all ywhom it may concern:

Be it known that we, ALBERT S. HUBBABJA, a citizen of the United States, and a resident of Belleville, inthe county of Essex and State of New Jersey, and Wm! A. TURBAYNE, a citizen of the United Stat-es, and a' resident of Lancaster, inthe county o Erie and State of New York, have invented certain new and useful Improvenients in the Art of Electrical System of Distribution, of which the following is a specification.

Our invention relates to alternating current systems 0f distribution supplied by an alternating current generator and'especially to the arrangement therein of a special character of transformer connected to a regulating circuit.

In alternating current systems it 1s desirable to tain a reasonably' steady load upon the alternating current generator and this has been eected by' the use of a regulating battery and booster operating inthe mm y manner as such batteries and boosters have been made to operate with reference to direct current circuits, there being between thebattery and booster o the alternating current sideo the system a rectifying device of some character, such as a rotary converter or a motor generator. It has been pnopoeedto regulate the bat-I tery current, preferably by a regulation of the booster i voltage, by means of changes` oi current on the main alternating current generator, and for thi! Pul'pe an" alternating current regulating circuit has been provided f with suitable rectifying devices to regulate the boter field strength in accordance with changes of load on the main alternating current generator.g lWe have applied our invention to such a system although in its broader phase it is not'necemarily llnited'to this precise system.

Our invention consists in the provision in such s reg- -ulating circuit of-a transfornseror where the circuit is a multiphasev .01ie, a plurality of transformers-which may be adjusted by the station attendant -to vary the ratio between the primary and secondary windings the transformer sof that the regulating circuit may be adjusted for dierent values of regulation. Thus vin the presentV instance we have applied ourY invention to a system having a three phase generator, and haveldded to a'three phase regulating circuit whose current is governed by the current strength of the main generator and which contains a rectifier device to supply direct current for regulating the booster voltage, three trsnsfomlers having their secondaries connected to three series of fixed contacts, and have mechanically connected three movable brushes which therefore may be simul teneously moved by the station attendant to vary the V ratio of current transformation in the transformers so that the attendant may adjust the regulatingl circuit for any desired current strength on the main generator.

tion of a preferred forni of our invention; Fig. 2 shows' one of the contact brushes of the treniermer in a some-v what larger scale.

A is s main alternating current generator giving three phase currents.

.B is s transformer which ie preierebly used, 11.1 Buch i systems, to reduce the voltage of the current that isto be used for the rotary converter or motor generator.

Connected to the secondary of this transformer is, the

alternating current end of s rectiying device the present instance s rotary converter. The direct cnrrent end of the rotary converter C isconnected in a hat,- y

' tery branch containing the storagelnttery l) and book ter armature E. The work circuit of the System my be direct work circuit connected to tbeconductore 1 and 2, or it may be an alternating Current circuit connected to the conductors 3, 4, 5, or work circuits may `be connected to both of these sets of conductors.

It is, desirable t9, Gimme the booster et. s

constant speed. In the present instance we have indi-- cated a synchrone@ meter F connected t@ the sacandary of the transformer B and mechanically connected with the imiter "mature In order tn the; booster valises a circuit is provided, the Current therein primarily.

regulated by the series customer G whose primaries are ,connected in the Oircuit of the generato? A,

while the secndarissupply the current to conductors i 6, 7 and 8st the regulating circuit. i

H, J represent respectively. primaries find Secondsres Qi three transformers, the primaries being, through the conductors 6.. 7, 8, connected to the secondarie@ 0f the transformen G.,'wh1e the secondarie@ supply-cur` 1 reni through sie conductos. a, 10, 11, 1213 and 1A .to

a rectifyinb device K rotated st synchronous speed 'by the rsynchronous motor L( The transformers shown in the, drawings are of that type .in which the primary and secondary turns are turns of separate coils, but itis to be understood that this is not importent to. the present invention. The rectifying device K consists oi three ,I

commutton in series; as indicated. S0 thtih fed by the three secondaries are connected in series and rectified in the circuit 15, 16., latter circuit is, of.

course, a direct current circuit and has 9, substantially continuan@ current, the pulsations .being alims@ climinated by the additionof the three out of phase voltages.

Since such a rectifier is well known and its specific character forms no part of .thepresent invention it is not necessary to describe it further. y

',Thecurrent in the circuit I5, 16 is employed to supply current to the field coil L( of a regulating dynamo,

in the present case, a counter-electro-motive force machine. T he armatureL o ftbis machineis connected in series with the booster field winding E. the, two being in a shunt across the direct current' 'side ofthe system, This' manner of regulating the Vvoltage of the ,battery booster is so well known and has been so frequently described in prior patents and applications that-it is unnecessary for us to describe it more in detail.' It is suflicient to say that thel counter machine connected across 1 the circuit in series with the booster field andregulated in accordance with changes of the system constitutes a vmeans for supplying to the booster field the resultant of opposing potential differences and. of varying that resultant in accordance with the needs of the system.

Returning now tothe transformers H, J, litfwill be noted that the secondary of each of these transformers i has its winding connected'to a number of contacts j. In

each case the conductqrs9, 1lV and 13 instead of being connected directly to the secondary J, as arethe conductors 10,12 and l4, are connectedtoa continuous contact j". transformer completes the connectionbetween the secondary and the continuous contact j and, therefore, completes a, circuit tothe-secondary through the brush b, having one end split so as to form contacts b which are of insufficient width'to bridge the space between adjacent xed contacts j and which at the other end' engage thecontinuouscontacts j. The parts B e .DY illuhtion i but are electrically ,convnected througli a high resistance r.

. The three brushes b are operated simultaneously by die snm-smaad. by hand heel. s/z-and having .threaded portions n which passthrough correspondingly threaded portions of the brushes b. In' the present in; stance each brush at one end 4is formed with a point andl adjacent to the line of inoye'mentof said point isa scale indicating the number of upon the main genlerator corresponding toflthe various? positions of the brush. Evidently, since all' three brushes move together only one of these scales will be necessary, but it may be found desirableto employ all three so as to in- .sure at any time that the three brushes are properly set. 4

The'operation of the apparatus ,isms follows: Asfsuming the brushes b to -be set at any given position then 'the desired ayerage load upon the main generator will cause a current to traverse the regulating circuit lthat will produce `inthe field winding L 'a current just. sufficient so that thejelectro-motive force of armature L equals that across the direct current side of the system. fAn increase of that average load will cause an increased current from the secondaries of transformers G, an increased current from the sc'condarics J', an

.increased current'in the field winding L and so a ement muis beweisen ,.win'dg in a certainv di. rction and of a value corresponding to the extent of the change of load on the generator A.- decrease of current in themain generator a decreased lcurrent in the coil L' dnd,W therefore; in agj I Qltg .QRpOlite in directionto tlijt-beoremxqducedf a 85 It the averagefnn;

suzanne ing upon the main generator say from eleven amperes as indicated on the drawings, to say twentyvamperes, the operator moves' the Wheel S until the brushes b point to-` the figure 20. By doing-this it will be seen that a vgreater number of turns of the secondaries .l are included in the circuit, therefore reducing the ratio of transformation in' the transformers H',`J. Since-the current in the. primaries and the transformers Gis not onder-ies of transformers G will not be changed nor will tLe' current in the primaries H.v The current,l however, in the secondaries I will be decreased and there# lating eect than before. invention illustrated and described the adjustment of the value of the regulation is, therefore, specifically ator, vthis adjustment lnotsub'stantially varying the fineness of regulation.v4 Where we refer generally to adjustment of the value of regulation', we,l however,

either or any purpose.

While we have shown the contacts b b connected through a resistance r. it will 'beurnlerstood Vthatthe essential point with relation'tothisis that the conf' nection between vthese' brushes mustmcomprise' a c irnclude 'not only mere ohmic Vresist-ance'but counter .electro-motive force devices as well;` Again,in rea direct current clrcult, a

I rectlfylng device between the 'alternating current and t ,current circuits, a

la ttery connected to the direct curr nt clrcnlt, a regulating a ternatln'g current clrcultand apparatusv for-controlling the battery current agted upon by the varlatlons :ln-said regu'- means foi-.adjusting the ratlo between the prlmary and secondary turns ofossld transformer to adjust for dlfferent values of regulation.. f i i 2. The mblnstlon of an 'alternstlng current generator. u dhett `c rrent circuit, a rectlfylng device between the nlternatlng'current and direct current clrbuits, a battery connectedtothe direct current cli-cult, a regulatlngulten battery 4current. acted upon b v the varlatlons ln said regulntlng circuit. a transformer -ln the' regulating clrcult, means 'for adjusting the-ratlobetween the primary und secondary turns of said transformer to adjust for different vulues of regulatlon, and means for indicating the value of regulatlon for whlch the transformer; ls adjusted.

3. The corublnatlon of un ulternutlng current generator, n dlrectiurrent clrcult, s'rectfylngydevlce between the nlternntlug current :2d/direct current clrcults, s battery .connected to the dlfect current clre'ult; a regulatlngalternutlngclrcult sud apparatus 'for controlling the buttery Yc'urrsntacter upon hy the circuit a comi te dllfereiit polntstn one ofthe windings of the changed by this adjustment, the current in the sccfore a given current in thecoil Hrwill have less regu- In the embodiment of our an adjustment of the average load o'f the main generinclude the adjustmentl of the regulating circuit for'.

-cuit having a high opposition toy current flow. In yusing the term resistance iny the claims we intend to -ferring to the transformers H, J as three distinct trans- 1. The comblnatlon of van altermitlng current generator, l

latlng cli-cult, s transformer Aln the regulating circuit, and

natlng current circuit and apparatus for controlling the variations-"ln suld regulating: transformerf lnA thsregulntlng clrcult,A contacts season. v

transformer. and mechaniani adapted to connect one terminal kof the circuit for said winding to any of said contacts to adjust for diiferent values of regulation.

4. The combination "of an'alternating current-generator, v

u direct current clrcuit. u rectifylng device between the alternating current and direct current circuits, s battery connected to the directlcurrent circuit, a regulating alternating current circuit and appsratus'for controlling the buttery current acted upouirf the variations in saidv regulating circuit, a transformer in the regulatingcircuit.-

means for adjusting the ,ratio between the primaxyand seconda ry :turns of saidtranstomer to adjust fordilerent values of regulation; and means' for indicating he value f regu/lation for which the transformer is`adjusted.

5. The combination of an alternating current generator,

.u direct vcurrent circuit, a rectifying device Ybetween the alternating current and direct. currentcircults, a battery connected to the direct current circuit, a regulating alternating current ycircuit and apparatus for controlling the battery current acted upon by the variations in ,said regulating circuit, a transformer in the regulating circuit, xed contacts connected to dliferent points in one of the windings of the transformer, s pair of contacta connected electrically through :i resistance, menus for moving nid pair of contacts over said fixed contacts, and n connection between said 'pull' of contacts and a terminal of the circuit connected to the transformer'.

6. The combination of an alternating current generator,

ra direct current circuit, u rectifying device between the.

alternating current and direct current circuits, a battery connected to the direct current circuit, a regulating,v alternatlngcurrent circuit and apparatus for controlling the battery current noted upnu by the variations in said regnlatng circuit, u transformer in the regulating circuit,

iixcd contacts connected to` different points in one of the windings of the transformer. a pair of contacts-connected' electrically through a resistance, means for moving said pair of contacts overV said tixed contacts, a connection between said pair of contacts and a terminal of Athe circuit connected to tile transformer, and means for indicating the value of regulation corresponding to various positions of the said pair of contacts.

" 7. poiypbase alternating current generator-.Ia rectify ing device connected thereto, a battery connected to the direct current end of the rectifying device, a polyphase reguiat'ingucircuit and apparatusA therein 'for controuliig the battery current, transformers in diiferent brancliecroil said regulating circuit, and means for simultaneously ysry'- ing the ratio of transformation in each of said transforrners to adjust for different values of regulation.

8. A polyphane alternating current generator, a rectify I ,ing device connected thereto, a battery connected to the 'diract'current end of the rectifyiug device, s polyphase regulatingeircuit and apparatus therein for' controlling the'hsttery eurrent, `transfonzers in diifereut branchesl of.v said regulating circuit, s series of ilxsd contacts con-y nected to di'ereltpo'ints in one of the windings of each lof said transformers', and'movable contacts each connected to.one terminal of the circuit of .one of said windings and engaging the series of ilxed contacts, and a mechemical connectidn between said Kmovable contacts.

9. A poiyphase alternating current generator; n rectify'- ing device connected thereto, s battery connected to the direct current end of the rectlfylng device, a poiypbnse regulating circuit and apparatus therein for controlling the battery current, transformers in different brauch of said regulating circuit, s series of iixed contacts connected to dllerent points inone of the windings of each of said transformers, and movable contacts each connected .to one' terminal of the circuit of one of said windinga'and engag-` `ing the series of nxed contacts, s mechanical-connection 

